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Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China
Phys. Chem. Chem. Phys., 2012,14, 11048-11052
17 May 2012,
12 Jun 2012
First published online
10 Jul 2012
Mesoporous slit-structured NiO materials were prepared through a simple hydrothermal route with sodium dodecyl benzene sulfonate (SDBS) as an additive. The as-prepared NiO samples presented high specific capacitance of over 1700 F g−1 in the potential range from 0.10 to 0.56 V (vs. Hg/HgO/6 mol L−1 KOH) at a constant current of 2 A g−1, and good capacitance retention of 90% after 1000 continuous charge–discharge cycles. Only the NiO electrode materials with uniform slit-structured mesopores, which were confirmed through nitrogen adsorption–desorption isotherms and high-resolution transmission electron microscope, delivered excellent capacitances far beyond any previous report up to now. Pore structures (including pore shape, size, and distribution) are dominant factors in pseudocapacitor materials.
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Physical Chemistry Chemical Physics
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